LENDOO I5 Plus Smart Bracelet Step Pedometer IP65 Waterproof Fitness Tracker Touch Screen Sports Wristband Bluetooth 4.0 Tracking Calorie Health Sleep Monitor for Android iOS Phones (Black) Waterproof DesignIP65 Living Waterproof Design, No Need to Remove Even When You Wash Hands. (Please Take Off When You Diving and Swimming).please update the firmware to 2.1.1.7. Almighty FunctionsSteps Counting, Mobile Anti-lost, Camera Remote Control, Sedentary Reminder, SMS Reminding, Call Reminder, Incoming Calls Show, Calories Burned Measuring, Sleep Management, APP Message Reminder (Like Facebook, Twitter, etc). Smart Technology0.91" OLED Touch Screen with Gesture Senser Control, the Screen Will Automatically Light up When You Turn Over Hand, Act as Traditional Watch. Comfortable WearingAdjustable Silicon Band Fit (5.5" - 7.6") for Different Wrist Size, 25g Light Weight Makes You Feel Free.please make sure to use the correct app(2 versions: horizontal display use ZERONER, vertical display use ZERONER HEALTH), and and meet all the requested conditions (bluetooth over V4.0, Android over 4.3, IOS over 8.0) Easy CompairingRequired Bluetooth Version 4.0 and Above, Fit for Smartphones Over Android 4.3 Version and IOS 8.0 Version. Use Together with APP "ZERONER" or "ZERONER HEALTH".